JumpThreading keeps LazyValueInfo up to date, so we don't need to rerun it

if we schedule another LVI-using pass afterwards.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112722 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Scalar/JumpThreading.cpp b/lib/Transforms/Scalar/JumpThreading.cpp
index abf98866aec5f19f9d5aa236004808b416fc0261..6fd8ed10efffe0598419192c92961ea08040b880 100644 (file)
--- a/lib/Transforms/Scalar/JumpThreading.cpp
+++ b/lib/Transforms/Scalar/JumpThreading.cpp
@@ -100,8 +100,10 @@ namespace {
     bool runOnFunction(Function &F);
     
     virtual void getAnalysisUsage(AnalysisUsage &AU) const {
-      if (EnableLVI)
+      if (EnableLVI) {
         AU.addRequired<LazyValueInfo>();
+        AU.addPreserved<LazyValueInfo>();
+      }
     }
     
     void FindLoopHeaders(Function &F);